For 2026 the SEAI solar PV grant is a flat €1,800. The structure behind that figure is €700 per kWp for the first 2 kWp and €200 per kWp for the next 2 kWp, which caps out at €1,800 once your system reaches 4 kWp — and since almost every domestic system is 4 kWp or larger, in practice you're looking at the full €1,800. Older quotes or articles citing €2,100 or €2,400 are out of date; the grant was stepped down to €1,800 and that's the current 2026 figure.
There's a deadline worth knowing: the grant drops again to €1,500 from 1 January 2027, a €300 reduction. So if you're ready to go and you're near the turn of the year, getting the install and paperwork completed in 2026 secures the higher €1,800. It's not a reason to rush a bad decision, but it is a real incentive not to drift into the new year if you're otherwise set.
To get it you need an SEAI-registered installer, your home built and occupied before a qualifying date, and a post-works BER assessment. The grant is usually handled so you pay the reduced amount rather than claiming it back yourself, and it stacks with the 0% VAT on domestic solar — so the grant and the VAT relief are two separate savings that combine. Budget on €1,800 for a 2026 completion, €1,500 from 2027.